USE [ANTS_NetServer]
GO

/****** Object:  StoredProcedure [dbo].[proc_paged_part_select]    Script Date: 04/21/2013 15:27:11 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[proc_paged_part_select](
  @tblName     nvarchar(200),        ----要显示的表或多个表的连接 
  @fldName     nvarchar(500) = '*',    ----要显示的字段列表 
  @pageSize    int = 10,        ----每页显示的记录个数 
 @page        int = 1,        ----要显示那一页的记录 
 @fldSort    nvarchar(200) = null,    ----排序字段列表或条件 
 @Sort        bit = 0,        ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ') 
 @strCondition    nvarchar(1000) = null,    ----查询条件,不需where 
 @ID        nvarchar(150),        ----主表的主键 
 @Dist                 bit = 0,           ----是否添加查询字段的 DISTINCT 默认0不添加/1添加 
 @pageCount    int = 1 output,            ----查询结果分页后的总页数 
 @Counts    int = 1 output                ----查询到的记录数 
 )  --调用示例exec proc_paged_part_selectMax1 'DeviceInfo_t','Sn,Mac,Port', 10, 1, 'Sn', 0,null, 'Sn',0
 AS 
 SET NOCOUNT ON 
 Declare @sqlTmp nvarchar(1000)        ----存放动态生成的SQL语句 
 Declare @strTmp nvarchar(1000)        ----存放取得查询结果总数的查询语句 
 Declare @strID     nvarchar(1000)        ----存放取得查询开头或结尾ID的查询语句 
 
 Declare @strSortType nvarchar(10)    ----数据排序规则A 
 Declare @strFSortType nvarchar(10)    ----数据排序规则B 
 
 Declare @SqlSelect nvarchar(50)         ----对含有DISTINCT的查询进行SQL构造 
 Declare @SqlCounts nvarchar(50)          ----对含有DISTINCT的总数查询进行SQL构造 
 
 declare @timediff datetime  --耗时测试时间差 
 select @timediff=getdate() 
 
 if @Dist  = 0 
 begin 
     set @SqlSelect = 'select ' 
     set @SqlCounts = 'Count(*)' 
 end 
 else 
 begin 
     set @SqlSelect = 'select distinct ' 
     set @SqlCounts = 'Count(DISTINCT '+@ID+')' 
 end 
 
 
 if @Sort=0 
 begin 
     set @strFSortType=' ASC ' 
     set @strSortType=' DESC ' 
 end 
 else 
 begin 
     set @strFSortType=' DESC ' 
     set @strSortType=' ASC ' 
 end 
 
 
 
 --------生成查询语句-------- 
 --此处@strTmp为取得查询结果数量的语句 
 if @strCondition is null or @strCondition=''     --没有设置显示条件 
 begin 
     set @sqlTmp =  @fldName + ' From ' + @tblName 
     set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName 
     set @strID = ' From ' + @tblName 
 end 
 else 
 begin 
     set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition 
     set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition 
     set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition 
 end 
 
 ----取得查询结果总数量----- 
 exec sp_executesql @strTmp,N'@Counts int out ',@Counts out 
 declare @tmpCounts int 
 if @Counts = 0 
     set @tmpCounts = 1 
 else 
     set @tmpCounts = @Counts 
 
     --取得分页总数 
     set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize 
 
     /**//**//**//**当前页大于总页数 取最后一页**/ 
     if @page>@pageCount 
         set @page=@pageCount 
 
     --/*-----数据分页2分处理-------*/ 
     declare @pageIndex int --总数/页大小 
     declare @lastcount int --总数%页大小  
 
     set @pageIndex = @tmpCounts/@pageSize 
     set @lastcount = @tmpCounts%@pageSize 
     if @lastcount > 0 
         set @pageIndex = @pageIndex + 1 
     else 
         set @lastcount = @pagesize 
     --//***显示分页 
    if @strCondition is null or @strCondition=''     --没有设置显示条件 
    begin 
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理 
            begin  
                if @page=1
                BEGIN
                	set @strTmp=@SqlSelect+' top '+CAST(@pageSize as varchar(4))+' '+@fldName+' from '+@tblName+' order by '+@fldSort+' '+ @strFSortType
                	--@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName+' order by '+ @fldSort +' '+ @strFSortType 
                   -- print @strTmp
                END
                else 
               begin 
                    if @Sort=1 
                    begin                     
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
     +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' order by '+ @fldSort +' '+ @strFSortType 
                    end 
                    else 
                    begin 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' order by '+ @fldSort +' '+ @strFSortType  
                    end 
                end     
            end 
        else 
            begin 
            set @page = @pageIndex-@page+1 --后半部分数据处理 
                if @page <= 1 --最后一页数据显示                 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType  
                else 
                    if @Sort=1 
                    begin 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
                    end 
                    else 
                    begin 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType  
                    end 
            end 
    end 

    else --有查询条件 
    begin 
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理 
        begin 
                if @page=1 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName                         
                        +' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType 
                else if(@Sort=1) 
                begin                     
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType 
                end 
                else 
                begin 
                    set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)' 
                        +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType  
                end            
        end 
   else 
        begin  
            set @page = @pageIndex-@page+1 --后半部分数据处理 
            if @page <= 1 --最后一页数据显示 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType                      
            else if(@Sort=1) 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' >(select max('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType     
            else 
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName 
                        +' where '+@ID+' <(select min('+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName 
                        +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)' 
                        +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType             
        end     
    end 

------返回查询结果----- 
exec sp_executesql @strTmp
--select @pageCount as pageCount,@Counts as Counts
--调试时用到select datediff(ms,@timediff,getdate()) as 耗时 
--调试时用到print @strTmp 
--print @strTmp 
--print @pageCount
--print @Counts
SET NOCOUNT OFF
GO

